Samsung S5 Screen black screen after the wireless network automatically disconnected how to solve?

I did not know in Baidu the original screen after black screen wireless network automatically disconnected, is our mobile phone to open the WLAN sleep mode function, we just close it can be solved

1. I click on the S5 desktop "application" to enter, as shown in the picture.

2. Then click the "Settings" menu.

3. Then in the Open menu interface there will be a "WLAN" option.

4. We go into the WLAN and we click on the "Menu" button and click on the "Advanced Settings" menu.

5. OK here you will see a "Keep WLAN open during sleep".

6. The current status is "never (increase data usage)" as shown in the following figure.

7. Now we click on "Always" can be.



After this setup you see if you won't come out in front of the problem we talked about ha.